Final answer:
Molecules other than proteins do not denature; denaturation is specific to proteins and refers to the loss of their three-dimensional structure, which is required for function. Therefore, the correct option is ''do not denature''.
Step-by-step explanation:
Once degradation begins, all molecules, other than proteins, do not necessarily denature as this term is specific to proteins and their structure. Proteins unfold and become almost linear polypeptide chains upon denaturation, and can no longer perform their functions. Other molecules might degrade or change, but they don't denature in the same way proteins do due to their different structures and properties.
Denaturation of proteins can be caused by several factors, including extreme heat, changes in pH, and exposure to certain chemicals. It's a change in the three-dimensional structure of a protein that renders it incapable of performing its assigned function. When proteins such as the albumins and globulins are denatured by heat, they can form insoluble aggregates known as coagulum.